(6)
After approximately 16 (士 2) minutes the Trip and Date Encoder will stop, the indicator light on the encoder will go out and the Bit 2 light on the portable tester will go out.
(7)
Return flight recorder TEST NORMAL switch to NORMAL.
H. Test Magnetic Heading
(1)
Ensure flight recorder TEST NORMAL switch is in TEST position.
(2)
Switch on the compass system. Place COMPASS TRANSFER switch to NORMAL position.
(3)
Select Subframe 0 word 3 on the portable tester.
(4)
Rotate RMI SYNCH knob on first officer's instrument panel to select F/O RMI card position as indicated below, and check that the corresponding portable tester readout is as follows.
RMI CARD PORTABLE TESTER
POSITION READOUT
0 7756-0022 (nominal 0000)
30 0421-0500 (nominal 0450)
330 7300-7360 (nominal 7331)
(5) Return flight recorder TEST NORMAL switch to NORMAL
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I. Test acceleration signals
(1)
Ensure flight recorder TEST NORMAL switch is in TEST position.
(2)
Select Subframe 0 word 2 on portable tester and check the portable tester readout is between 3714-4064 (nominal 4000).
(3)
Repeat the above for words 10 and 13.
(4)
Check the portable tester readout is same as step (2) above.
(5)
Return flight recorder TEST NORMAL switch to NORMAL.
J. Test altitude signals
(1)
Ensure flight recorder TEST NORMAL switch is in TEST position.
(2)
Connect a pneumatic test unit to the airplanes pitot-static system (Ref 34-11-0).
(3)
Select subframe 0 on the portable tester.
(4)
Using the pneumatic test unit simulate on CADC-1, the altitudes shown below. For each altitude check that the portable tester readout is as shown, when word 23 and word 5 are selected.
ALTITUDE (FT) PORTABLE TESTER READOUT
ALTITUDE
(1)
Ensure flight recorder TEST NORMAL switch is in TEST position.
(2)
Connect a pneumatic test unit to the airplanes pitot-static system (Ref 34-11-0).
(3)
Select subframe 0 word 19 on the portable tester.
(4)
Using the pneumatic test unit simulate on CADC-1, the airspeeds shown below. For each airspeed check that the portable tester readout is as shown.
AIRSPEED (KNOTS) PORTABLE TESTER READOUT 100 7647 to 0126 (nominal 0000) 400 4145 to 4421 (nominal 4273)
(5)
Return flight recorder TEST NORMAL switch to NORMAL.
COARSE (WORD 23) FINE (WORD 5)
0 7775 to 0003 (nominal 0000) 7676 to 0101 (nominal 0000)
14,250 0604 to 0627 (nominal 0613) 6360 to 7042 (nominal 6564)
31,000 1657 to 1713 (nominal 1676) 1431 to 1633 (nominal 1532)
(5) Return flight recorder TEST NORMAL switch to NORMA L.
K. Test airspeed signals
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L. Test ATC Event (VHF Keying)
NOTE: Before this test is conducted, authority must be obtained to use the VHF equipment on an authorized test frequency.
(1)
Ensure flight recorder TEST NORMAL switch is in TEST position.
(2)
Close VHF-1 and VHF-3 circuit breakers on P18-2 circuit breaker panel, and VHF-2 on P6-1 circuit breaker panel.
(3)
Verify all VHF transmitters are set on an authorized frequency.
(4)
On the Captain's Audio selector panel press the appropriate mike selector VHF-1, VHF-2, and VHF-3. After each selection select Subframe 0 word 9 on portable tester and press the Captain's PTT button.
(5)
Check that Bit 1 light is illuminated then goes out when the PTT switch is pressed.
(6)
Return flight recorder TEST NORMAL switch to NORMAL position.
M. Restore airplane to normal.
N. On Flight Recorder Test Module, ensure TEST NORMAL switch is in NORMAL position.
O. Place the POWER switch on portable tester to OFF, and disconnect portable tester from flight recorder.
P. Remove electrical power, if no longer required (Ref 24-22-0).
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FLIGHT RECORDER SYSTEM - DESCRIPTION AND OPERATION
EFFECTIVITY
Airplanes with Fairchild analog flight recorder
1. General (Fig. 1)
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